22765047640 has 128 divisors (see below), whose sum is σ = 54668390400. Its totient is φ = 8513556480.

The previous prime is 22765047637. The next prime is 22765047673. The reversal of 22765047640 is 4674056722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7484520 + ... + 7487560.

It is an arithmetic number, because the mean of its divisors is an integer number (427096800).

Almost surely, 2^22765047640 is an apocalyptic number.

22765047640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22765047640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27334195200).

22765047640 is an abundant number, since it is smaller than the sum of its proper divisors (31903342760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22765047640 is a wasteful number, since it uses less digits than its factorization.

22765047640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 22765047640 in words is "twenty-two billion, seven hundred sixty-five million, forty-seven thousand, six hundred forty".